# SDR SWAA2013111422347

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 2013
- Submitted: November 14, 2013
- Operation: Air carrier
- Aircraft: N766SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29806
- Aircraft time: 49,088 hours, 28,639 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Control Valve
- Part number: 32895625
- Part serial: 8436
- Condition: Faulty
- Location: Bleed Air Sys
- Stage of operation: UK
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2013111422347

## Discrepancy

DECLARED EMERGENCY DUAL BLEED TRIP FAILURE @ FL 410 RT BLEED TRIP LIGHT ILLUMINATED  FOLLOWED BY LT BLEED TRIP LIGHT INITIATED EMERGENCY DESCENT.  FOUND BAD PRECOOLER CONTROL VALVE.  R & R NR 1 ENGINE PRECOOLER CONTROL VALVE IAW MM.

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